I've got many handguns, with one exception, all revolvers. They fall into "groups" and were bought over the years to study some particular phase of handgun shooting. During my phase of load development, I had a Smith & Wesson in 4" and 6" barrel lengths for .357 Magnum, .44 Magnum, and .45 Colt. I chronographed loads out of each to compare velocity/barrel length performance. In addition to these I bought Smiths for home defense and personal carry.
I got interested in Single Action revolvers as hunting guns and the first led to more and more. Then came building custom Rugers, just for the pleasure of owning, and shooting, such beautiies.
Also went through a NRA Bullseye target shooting phase, using Colt Officers Model Match revolvers in .22 and .38.
Currently I'm working up loads in two Ruger .44s, a custom .44 Special, and a custom .44 Magnum.
So, as I get involved in a "phase" other guns get neglected.